Hi Chris,
I love to blend and I have quite the collection to work with! I secretly think why we soap is all about the smell. When I have a less potent smell with a good base I'll blend it with something appropriate: wood smells with spice smells, for example. I'm pretty sure there are many of us out there who do this. Only two slight warnings- results may be great or less than expected & mixes may seize so be ready-no vendor notes to draw from here.
Some suppliers will make comments in their product notes regarding the item being a "good blender," meaning use it with another fragrance to your liking. A commonly used blender FO is citrus- orange, lime, grapefruit, since for CP soaps, staying power is much better with citrus FO's & it is typically a good match to the real thing. Regarding citrus eo's -their low flash point is the problem, typically <140F and we soap near this temp or the gel stage gets near there & most of the scent "burns off." Regardless, unless you use a lot and/or have a very good nose and are happy with a delicate citrus scent, the FO yields a better bar and typically will not seize. I blend lily fo with a pinch of orange fo then add bergamot/coriander eo's for a smell that I love. It has been requested by many. So - you can also combine an eo with an fo as well.
Good luck and have fun!
Julie